1HIA:
reference: A new structural class of serine protease inhibitors revealed by the structure of the hirustasin-kallikrein complex., Mittl PR, Di Marco S, Fendrich G, Pohlig G, Heim J, Sommerhoff C, Fritz H, Priestle JP, Grutter MG, Structure 1997 Feb 15;5(2):253-64. PMID: 9032072

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).